def main():
    a = [1, 2, 3, 4]
    b = four_time_nums(a)
    print(a)
    print(b)


# 数组放大四倍
def four_time_nums(num):
    length = len(num)
    result = []
    for i in num:
        for j in range(4):
            result.append(i)
    return result


if __name__ == "__main__":
    main()
